<template>
<el-container class="home-container">
    <!--头部区域-->
    <el-header>
    <div>
        <img src="../assets/caomao.png" alt />
        <span>电商后台管理系统</span>
    </div>
        <el-button type="info" @click="loginOut">退出</el-button>
    </el-header>
    <!--页面主题区域-->
    <el-container>
        <!--侧边栏-->
        <el-aside :width="isCollapse ? '64px':'200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!--侧边栏菜单区域-->
        <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF"
        :unique-opened="true" :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath">
        <!--1级菜单-->
            <el-submenu :index="item.id + ''" v-for="item in menuList" :key="item.id">
            <!--1级菜单模板区域-->
            <template slot="title">
                <!--图标-->
                <i :class="iconsObj[item.id]"></i>
                <!--文本-->
                <span>{{item.authName}}</span>
            </template>
            <!--2级菜单-->
            <el-menu-item :index=" '/' +subItem.path" v-for="subItem in item.children" :key="subItem.id"
                @click="saveNavState('/' +subItem.path)"
            >
                <template slot="title"> 
                <!--图标-->
                <i class="el-icon-menu"></i>
                <!--文本-->
                <span>{{subItem.authName}}</span>
            </template>
            </el-menu-item>
            </el-submenu>
        </el-menu>
    </el-aside>
    <!--右侧内容主体-->
    <el-main>
        <!--路由占位符-->
        <router-view></router-view>
    </el-main>
    </el-container>
    </el-container>
</template>

<script>
export default {
    data() {
        return {
            //左侧菜单数据
            menuList:[],
            iconsObj:{
                '125': 'iconfont icon-user',
                '103': 'iconfont icon-tijikongjian',
                '101': 'iconfont icon-shangpin',
                '102': 'iconfont icon-danju',
                '145': 'iconfont icon-baobiao'
            },
            //是否折叠
            isCollapse: false,
            //被激活链接的路径
            activePath: ''
        };
    },
    created(){
        this.getMenuList()  
        this.activePath = window.sessionStorage.getItem('activePath')
    },
    methods: {
        loginOut: function() {
         //清空token
        window.sessionStorage.clear();
         //跳转到登录页
        this.$router.push("/login");
        },
        //获取所有的菜单
        async getMenuList(){
            const {data:res} = await this.$http.get('menus')
            if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
            //console.log(res)
            this.menuList=res.data
        },
        //点击按钮切换菜单的折叠与展开
        toggleCollapse(){
            this.isCollapse = !this.isCollapse;
        },
        //保存链接的激活状态
        saveNavState(activePath){
            window.sessionStorage.setItem('activePath',activePath);
            this.activePath = activePath;
        }
    }
};
</script>
<style lang="less" scoped>
.home-container {
    height: 100%;
}
.el-header {
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    > div {
    display: flex;
    align-items: center;
    span {
    margin-left: 15px;
    }
    }
}
.el-aside {
    background-color: #333744;
    .el-menu{
        border-right: none;
    }
}
.el-main {
    background-color: #eaedf1;
}
.iconfont{
    margin-right: 10px;
}
.toggle-button{
    background-color: #4A5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor:pointer;
}
</style>